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# SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
# SPDX-License-Identifier: MIT
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
from torch import nn
class CachedModule(nn.Module):
def __init__(self, block, select_cache_step_func) -> None:
super().__init__()
self.block = block
self.select_cache_step_func = select_cache_step_func
self.cur_step = 0
self.cached_results = None
self.enabled = True
def __getattr__(self, name):
try:
return super().__getattr__(name)
except AttributeError:
return getattr(self.block, name)
def if_cache(self):
return self.select_cache_step_func(self.cur_step) and self.enabled
def enable_cache(self):
self.enabled = True
def disable_cache(self):
self.enabled = False
self.cur_step = 0
def forward(self, *args, **kwargs):
if not self.if_cache():
self.cached_results = self.block(*args, **kwargs)
if self.enabled:
self.cur_step += 1
return self.cached_results
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